<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div>
        <!-- v-if=true显示 false不显示
             isLogin=true表示登陆成功
             isLogin=false表示未登录 -->
        <div v-if="isLogin">
            <input type="text" v-model="newName">
            <input type="button" value="添加" @click="arr.push(newName)">
            <!-- javascript:void(0),如果超链接点击时,不离开此页面需要添加此代码,废掉跳转功能 -->
            <a href="javascript:void(0)" @click="isLogin=false">登出</a>
        </div>

        <div v-else>
            <a href="javascript:void(0)">注册</a>
            <a href="javascript:void(0)" @click="isLogin=true">登录</a>
        </div>

        <ul>
            <li v-for="name in arr">{{name}}</li>
        </ul>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        let v = new Vue({
            el:"body>div",
            data:{
                arr:["刘备","关羽"],
                isLogin:false,
                newName:""
            }
        })
    </script>
</body>
</html>